Atmosphere again headlines the popular Rhymesayers Entertainment takeover at Summerfest July 6, with Brother Ali, Sa-Roc and other artists on the Minneapolis-based hip-hop label. Courtesy of Summerfest

After being inducted into the Wisconsin Area Music Industry Hall of Fame this year, Paul Cebar's band Tomorrow Sound will headline a Summerfest stage July 6. The Milwaukee musician is also headlining with R&B Cadets June 27. Journal Sentinel files

Elastic R&B band Juice, which won the Journal Sentinel's Land the Big Gig competition a couple years ago, is back at Summerfest this year as a headliner, on July 7. Rick Wood / Milwaukee Journal Sentinel

The Summerfest stage announcements picked up again Monday, with the Milwaukee music festival announcing 21 headliners for the Briggs & Stratton Big Backyard stage, from universally lauded indie rocker Courtney Barnett; to veteran alt-rock act Third Eye Blind, to popular Christian hard rock band Skillet, featuring three members from Kenosha.

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Acclaimed songwriter and rocker Courtney Barnett will play Summerfest's Briggs & Stratton Big Backyard July 4, one of 21 headliners announced for the Milwaukee music fest stage Monday.(Photo: Kellen Nordstrom)

Summerfest general-admission tickets are available now at summerfest.com, priced between $15 (for weekday admission between noon and 4 p.m.) and $23 for all other days and times. Summerfest also typically offers several promotional deals that include free or discounted admission; those deals have yet to be announced for 2019.

Multi-day general-admission passes are available on the Summerfest site as well, for $57 for three days, or $120 for 11 days.

Schoolboy Q, who last played Summerfest's amphitheater in 2015 opening for Kendrick Lamar, will return there July 7. It is the only show in the country this year where Schoolboy, Snoop and Wayne are all on the same bill. Katie Klann / For the Journal Sentinel

Fast-rising 17-year-old alternative pop artist Billie Eilish will play one of the biggest shows of her career when she headlines Summerfest's American Family Insurance Amphitheater July 6. Rob Grabowski / Associated Press

Lionel Richie will perform in Milwaukee for the first time since 2000, when he opened for what will likely be Tina Turner's last concert in the city at the Bradley Center. Richie headlines Summerfest's American Family Insurance Amphitheater July 2. Craig Sjodin, ABC

Willie Nelson & Family are headlining the Outlaw Music Festival at Summerfest June 27. The Nelson-led festival previously played the American Family Insurance Amphitheater in 2017. Rick Wood/Milwaukee Journal Sentinel

After playing Fiserv Forum's grand opening in September, the Killers will one of the first bands to play the partially remodeled American Family Insurance Amphitheater during Summerfest July 5. Rob Loud

Thomas Rhett, shown opening for Kenny Chesney at Miller Park in Milwaukee, will return for a Summerfest show. He'll be at the American Family Insurance Amphitheater on June 26. Mark Hoffman/Milwaukee Journal Sentinel

Grammy-winning alternative act Bon Iver, led by Eau Claire-born-and-based Justin Vernon, will play Summerfest for the first time June 29, the band's only Wisconsin appearance this summer. Benjamin E. Wick / Milwaukee Journal Sentinel

Zac Brown of Zac Brown Band performs at Bud Light Dive Bar in Atlanta on Jan. 31, as part of the pre-Super Bowl festivities. He will perform at Summerfest's American Family Insurance Amphitheater on June 30. Jason Kempin/Getty Images

General-admission passes do not include access to amphitheater shows, which are priced separately. Tickets are on sale for 10 of the 11 amphitheater shows for 2019, with the July 4 show to be announced. Amphitheater tickets include Summerfest general admission on the date of an applicable concert.

The world's largest music festival revealed 133 headliners earlier this month, and the headliner for several stages last week.